On Thu, Dec 08, 2022 at 11:44:44PM +0300, Odhiambo Washington via Exim-users wrote: > On Thu, Dec 8, 2022 at 11:38 PM The Doctor via Exim-users < > exim-users@exim.org> wrote: > > > On Thu, Dec 08, 2022 at 10:47:18PM +0300, Evgeniy Berdnikov via Exim-users > > wrote: > > > On Thu, Dec 08, 2022 at 12:22:13PM -0700, The Doctor via Exim-users > > wrote: > > > > On Thu, Dec 08, 2022 at 09:24:19PM +0300, Odhiambo Washington via > > Exim-users wrote: > > > [...] > > > > > >>> host in "5.34.207.0/24"? yes (matched "5.34.207.0/24") > > > > > >>> host in host_reject_connection? yes (matched "+host_rejects") > > > > > LOG: refused connection from [5.34.207.3] (host_reject_connection) > > > > > 554 SMTP service not available > > > > > root@gw:/usr/home/wash # > > > > > > > > Still seeing > > > > > > > > netstat -a | egrep smtp > > > > tcp4 0 0 exploreedmonton..smtps 5.34.207.189.26526 > > SYN_RCVD > > > > tcp4 0 0 comparealbertapo.smtps 5.34.207.190.30872 > > FIN_WAIT_2 > > > > tcp4 0 0 204.209.81.148.smtps 5.34.207.114.57546 > > FIN_WAIT_2 > > > > > > Rejection with status code 554 requires established TCP connection. > > > Study mainlog to check whether connections are rejected. > > > > > > However, absense of numerous connections in ESTABLISHED state is a hint > > > that rejection works. > > > > > > If you don't want TCP connections, use packet filtering on kernel level > > > instead of Exim's configuration options. > > > > I am surprised that my firewall ACL is not getting this > > in a switch! > > > I shared config snippets that work. > If you wanted to deal with this at the firewall level, you did not need > Exim to do it! >
As I said, the firewall wer not dropping the packets hence the need to use exim ACL. By the way, This looks like a very interesting attack! Have a look at https://www.nk.ca/~doctor/5.34.207.txt but be careful! This file is 113960735 bytes. > -- > Best regards, > Odhiambo WASHINGTON, > Nairobi,KE > +254 7 3200 0004/+254 7 2274 3223 > "Oh, the cruft.", egrep -v '^$|^.*#' ??\_(???)_/?? :-) > -- > ## List details at https://lists.exim.org/mailman/listinfo/exim-users > ## Exim details at http://www.exim.org/ > ## Please use the Wiki with this list - http://wiki.exim.org/ -- Member - Liberal International This is doc...@nk.ca Ici doc...@nk.ca Yahweh, King & country!Never Satan President Republic!Beware AntiChrist rising! Look at Psalms 14 and 53 on Atheism https://www.empire.kred/ROOTNK?t=94a1f39b Happy Christmas 2022 and Merry New Year 2023 Beware https://mindspring.com -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
